Fluid-pressure brake



Oct. 4,1921 1,644,569

C. C. FARMER FLUID PRESSURE BRAKE Filed Nov. 20, 1926 INVENTOR CLY DE. QF'ARMER BY%%M ATTORN EY Patented Get. 4,1927. I

i T m s l I nan-En STATES Pm 51 CLYDE o. ram/inn, 0F i rrrssnnsr PENNSYLVANIA, AssIGNoa Torrie WEsTINw HOUSE AIR BItAKEooMrANYmF WILMERDING, PENNSYLVANIA, A CORPORATION I V OF-PENNSYLVANIA.

rLUIn-rarissURE B AKE.

1 Application filed nove ber 20, isaa fse riaim. mash.

This invention relates t0 fluid pressure brakes and more particularly to a locomotive brake equipment. 7 The usual standard locomotive brake equipment includes a distributing valve device, an automaticbrake valve device, and an independent brake valve device, and the locomotive brakes are controlled, by operation of said brake valve devices, through a distributing valve release pipe and an application cylinder pipe which connects the brake valve devices to the distributlng valve device. I 1 I With both of the brake valve devices 1n running position, the application cylinder of the distributing'valve device is connected to the atmosphere through the distributing.

valve release pipe, while the application cylinder pipe connect'on is lapped at each brake valve device. I I I Since communication from the application cylinder to the release pipe is controlled by the equalizing-slidevalve of the distributing valve device, the locomotive brakes are released through the distributing valve release pipe only when the equalizing piston 1 I and slide valveof the distributing valved'- vice are in release position.

,If the equalizing piston and slide valve should cree 'onshift from the release position towar, the service position, due toa I decrease in brake pipe pressure,xsuch as i might be caused by a feed valve device working on a greater than usual range, the communication from'the' application cylinder to the distributing valve release pipe may be closed so that if fluid under pressure should leak into said applicationcylinder, there will be a tendency for the fluidpressure to build up therein and thus cause an application of the brakes.

One object of my invention is to provide 7 I means adapted to Warn the operator when the locomotive brakes are beginning to apply, undercircumstances such as described above.

1 Another object of my invention is to provide warning means adapted to produce a sound, distinctive from any other sound in a locomotive cab. it

In the accompanying drawing, the single .figure'is a diagrammatic View, partly in section, of a locomotive fluid pressure, brake equipment, with my invention embodied therein.

' As shown in the drawing the brake equip-Y ment may comprisefan automatic brake valvedevice 1, an independentbrake va'lve device 2, a distributing valve device 3,"a warning valve device 4-,a feed valve device 5, and a main reservoir,6.

The automatic brake valve device 1, may comprise a casing having'achamberj7, containing rotary valve 8, adapteld 'to befl operated by a handle 9. j

v The independent brake valve device fliiay comprise a casing halving a chamber 10 con valve 11 adapted v to, be

taining a rotary operatedby a handle 12.

. The'distributingvalve device 3 may comprise a casing having an application cylinder 131D constant communicatlon through the passage 14 with the application cylinder pipe1'5, and containing an application piston- 16 adapted to operate valves (not shown) for controlling the application 'and' 7 I release of the locomotive. brakes.

' Also contained in the casing. of' the' dis.

tributing'valve device13 ispthe usual equalizmg portion 17, having an equalizing slide valve .18 adapted to be operated byapiston a casing containing a flexible diaphragm 23, forming a chamber2l at one side'and a chamber- 25 at the opposite side, which chamber is connected to a whistle 28 through sage is connected to the distributing valve (not shown) and "adapted, in release'posie, tlon, to Connect passage 19 from the pllcation cylinder 13,'thr0ugh cavity'20 in apassageand pipe 29. said" casing also I has a chamber 30 containing a valve 31 subect to-jthe pressure of a spring 32 at one side and havinga stemadapted to be engaged and operated by the diaphragm 23.

With the brakevalveliandles i) and 12 in running-position, and the equalizing slide valve 18 of the distributing valveldevice 3 in release position,-the application cylinder 13' of the distributing valve device 3is .conv 1 1 and, 19,: cavity 20 in the equalizing slide valve 18, .passage .21, the distributing valve 'nected to the atmosphere through passages release'pipe passage 33. inthe independ- I fluent brake. valve device :2, {cavity '34- in the I :mtary' valveglli {P s a e 3 Pi e 365.9% v r 3 ili-awtomb rake d e' devi e 1; cavityf38 iinfthe rotary 'valv 5:18 a d "the atmos phericqexhaus't port 39. The applie .tion cyii'nd'er r pipe 7155-411 5 constant communi= 5 through "pipe 4Q, "passage 41,] v viy 42 in thelrotax vvalve 8 ofthefauto-"* matichrakeivalve dev ce l', pass age 435pi e' V 4415fpassage 45 inthe 'independent bra e iz'ek' 'dqvl e a t'y 46in t e e-ryye y 11,;passage r ft-and 'pipe48to chamber 24 m a a. ,7 a, pthmne p @25 pa age imi h mommies bakevalve.i v e l fi 1 6, n there n vilv s indi assag the ibrakepipef 58,

Cher said brake ipejffEluidnt thefre s mi-a so; i iv gth 'b P pes 52 aniber'30"of-thej.warnilig valve iii T h ti he d l 'ib ifi val e 3 it u i p s en '6; and th -1 s, i

th :bj l tkes,

,, p ss re m he it y ii fler l3,esfl-ebeve dB Q e r i 1881a cylindei'heing connected -toj".chen1ber 24 ve'lwder ce em res' n ad naiibi i lds 11g. hambe11 a, and I .Qhra' m t thereby oper ted to 9 j c l valv -.J;S .d'va v b ngepen, m an er we s ei supp i d wm: c m:

' fi w chembfl j 26; t e e th o gh i pa a-mlin e hamb r 2 sv 'i chim ae g'u'gh pine 29 tothe Whistle -dejhichil ee n e z wnd:hy1-the flow 1 fflfe d hmnghis id :Whistle I90 ,fihe} 13 81911 112, in the zwellkflown: man! Tcfitiim' hswitli sthe applicdtion cylinder 13, is

o 'ia i p s 'fi i-. l s;t a se r Q -m r s u ntention ly built 11 e pressure required in-ichaniberi24 of the; Warning valve device, to cause Inovement -j.:

of; the diaphragni'28cand the opening of the valve. 31 being low; suc'hjas', 2 pounds,

the quick rush of"fluid-"'under pressure into chamber '25 at the oppositesidef saiddia-w phmg 23', due to the o'pening'of valve 31,

causes a inoven'ien't oiijthe diaphragmhy the pressure in" chamber againstffthe slower pressure inch a inber 24;, so that thevalve31 is permitted to seat. Fluid in; chamber the Whistle. 28 until the pressure in chain- 231' is againfope ated by the-"higher pressure in chamber .2i, to"unseat'-thef"'valve 31 so chamber 2538' again charged Withn v ,c 4 fluid underpressure, caus' ng'said diaphragm to P BSO as, to 'perrnitfthe valve 1 fos'eat 7 locomotive cab.

ijWhen t Op ra-tor fis' ,t r ed- 125 then blowsfthrough" her-"25 isredueed to Ya degree'lessfthanfthei pressurein.chambefQhWhen the diaphragm f The whistle 28 is t'hus causedito en it a pulsating sound, Whicn'characteristic dis tinguishes th-e sound froniany other in'the undesiredipressure built up din-the applica-c tion" cylinder of the distributing?valve devalvev handle so as to connect the applica- "hon-cylinder 1'3 throughthe' application vice heican inovehis independent brake inder pipe- 15, directly to atmosphereand thus he iswenabled to prevent the flocorno tivebralies froin being applied. ,o e i Having now described niy invention, hat I; claim;as new and-desire to secure by Let ters. Patent,-is':- i l eluding ay-distributing Valve device having an appl cation cylinder, 0f-H lQ&11S I O I Warn- 1ng=;the engineer 1n casefthe pressure -1n S31 1'.lnn-arfiuid pressure bra-lie the coln'bination witha loconiotive brake. e ;1.uip- 1nentJin-v or 2.111 a fluid pressure brake, the coinbina 53 h Q11l i brake fiquipn entin i '110 anpapplicatio n cylinder, of means operated] by 'fiuid under, pressure unintentianally sup; Y pliedto-theapplication cylinder forWarning 1 the. engineer. 1

eluding distributing valve device having 8. In a fluid pressure hrarlze} the combination ithka locomotive-brake equipment i-n-c eluding a distributing valve device-having an =application cylinder, of "means operated upon an unintentional increase in pressure 11113118 application cylinder for intermittentlysounding asign'aI.

4.-. In a fluid pressure brake,

the cornbinationvvit'h a locomotive brake" equipment in-' i cludinge distributing valve device having 7 Q an 'application cylinder 1 and, a brake valve device, of-mean'soperatedV-under i pressurei'supplied from said applicationcylinder in the runningiposition-o'f said brake valve device-for warn ngutheengineen, i

5. In a fl'uid pressure/brake, the combinag 1.39" V tion with a locomotive brake equipment including a distributing valve device having an application cylinder, an automatic'brake valve device, and an independent brake valve device, of means operated by fluid under pressure from said application cylinder as supplied only when both brake valve devlces are in running position, for Warning,

the engineer. 7 a

6. In a fluid pressure brake, the combination With alocomotive brake equipment including a distributing valve device having an application cylinder and a brake valve device, of a Warning device comprising a sig-v nal, a valve for supplying fluid under pressure to operate said signal, and a movable abutment operated by fluid under pressure 'for actuating said valve, said abutment being operated by :fiuid supplied from saidap-' plication cylinder. v

7. In a fluid pressure brake, the combina-' tion with a locomotive brake equipment includinga distributing valve device having an application vcylinder and a brake valve device 1s in running position.

8. Ina fluid pressure brake, the co'mbina-- tion- With a locomotive brakeequipmentin- --'cluding a distributing valve device having an application cylinder, of a Warning device comprising a fluid pressure actuated signal, a valve forsupplying fluid'under pressure to said signal, and a movable abutment for operating .saidvalve, said abutment being subject on one side tofluid supplied from said application cylinder and on the opposite side to the pressure of. fluid supplied to said'signal'by the openingiof said valve. H

In testimony whereof I my hand.

have hereunto set ,CL DE o. FARMER. 

